HI Everyone. 

Strange problem: until yesterday my WPA4220 kit was working fine. Then suddenly the extender refused to pair with the adapter. Eventually I realised that the problem was with the wall outlet. When I moved the extender to a different socket in the same room it paired up and worked fine. Unfortunately the new socket is too far away from my TV etc. So does anyone know how to "revive" the original socket? When the extender is plugged into this socket now, the power LED and WiFi LED light up but the Powerline LED remains off.

Any thoughts much appreciated.